Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| 1 |
Apple
AAPL
|
+$258M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$75.7M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$67.2M |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$59.4M |
| 5 |
Intel
INTC
|
+$45.8M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$56.8M |
| 2 |
iShares Silver Trust
SLV
|
+$45.9M |
| 3 |
Ford
F
|
+$32.5M |
| 4 |
Exxon Mobil
XOM
|
+$20.4M |
| 5 |
Caterpillar
CAT
|
+$19.2M |
Sector Composition
| 1 | Technology | 26.01% |
| 2 | Consumer Discretionary | 9.82% |
| 3 | Communication Services | 9.82% |
| 4 | Financials | 8.68% |
| 5 | Healthcare | 6.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
526
ProShares Ultra Bloomberg Natural Gas
BOIL
$132M
| $546K | ﹤0.01% |
+130
| New | +$546K |
|
527
Sony
SONY
$172B
| $545K | ﹤0.01% |
+33,345
| New | +$545K |
|
528
Envista
NVST
$3.51B
| $543K | ﹤0.01% |
+14,094
| New | +$543K |
|
529
Direxion Daily FTSE China Bear 3X Shares
YANG
$170M
| $539K | ﹤0.01% |
+2,465
| New | +$539K |
|
530
Interactive Brokers
IBKR
$27.7B
| $538K | ﹤0.01% |
39,144
+22,248
| +132% | +$306K |
|
|
ADAM
531
Adamas Trust, Inc. Common Stock
ADAM
$659M
| $536K | ﹤0.01% |
48,566
-3,605
| -7% | -$39.8K |
|
532
Paycom
PAYC
$12.6B
| $535K | ﹤0.01% |
1,912
-3,541
| -65% | -$991K |
|
|
OTLY
533
Oatly Group
OTLY
$531M
| $534K | ﹤0.01% |
7,723
+5,285
| +217% | +$365K |
|
534
Alliant Energy
LNT
$16.5B
| $533K | ﹤0.01% |
+9,100
| New | +$533K |
|
535
Viant Technology
DSP
$168M
| $532K | ﹤0.01% |
104,915
+56,193
| +115% | +$285K |
|
536
Lantheus
LNTH
$3.65B
| $529K | ﹤0.01% |
8,015
-4,643
| -37% | -$306K |
|
|
ISEE
537
DELISTED
IVERIC bio, Inc. Common Stock
ISEE
| $527K | ﹤0.01% |
54,838
-12,656
| -19% | -$122K |
|
538
Cenovus Energy
CVE
$28.8B
| $521K | ﹤0.01% |
27,423
-86,019
| -76% | -$1.63M |
|
539
Axon Enterprise
AXON
$58.1B
| $520K | ﹤0.01% |
5,587
+4,693
| +525% | +$437K |
|
540
Colliers International
CIGI
$8.47B
| $520K | ﹤0.01% |
4,743
+1,738
| +58% | +$191K |
|
541
FuelCell Energy
FCEL
$118M
| $517K | ﹤0.01% |
4,602
-3,808
| -45% | -$428K |
|
542
Williams-Sonoma
WSM
$24.8B
| $517K | ﹤0.01% |
+9,334
| New | +$517K |
|
|
IGMS
543
DELISTED
IGM Biosciences
IGMS
| $516K | ﹤0.01% |
+28,642
| New | +$516K |
|
544
Graco
GGG
$14.2B
| $515K | ﹤0.01% |
+8,673
| New | +$515K |
|
545
Regency Centers
REG
$13.3B
| $513K | ﹤0.01% |
8,656
+5,903
| +214% | +$350K |
|
546
SIGA Technologies
SIGA
$620M
| $512K | ﹤0.01% |
44,291
+30,610
| +224% | +$354K |
|
547
Tractor Supply
TSCO
$31.8B
| $512K | ﹤0.01% |
13,230
+12,190
| +1,172% | +$472K |
|
548
Napco Security Technologies
NSSC
$1.44B
| $511K | ﹤0.01% |
24,821
+24,575
| +9,990% | +$506K |
|
549
Opendoor
OPEN
$4.5B
| $511K | ﹤0.01% |
108,574
-297,338
| -73% | -$1.4M |
|
550
iShares US Healthcare ETF
IYH
$2.79B
| $510K | ﹤0.01% |
+9,500
| New | +$510K |
|